Supported DME Table
Sensor Pin #
the negative terminal on the battery. Please use caution while
performing this step.
the engine compartment locate the DME housing.
a T-25 screwdriver (some models may use hex screws) loosen 4 screws
holding the cover in place. Swing the cover upwards to remove.
connectors to the DME, starting with the leftmost one. The 3 inner
connectors require you to push a release button from the top and swing
the locking arm to release the connector.
out the 2 tabs holding the DME in place, and raise the DME upwards
enough to be able to read the DME version. VERIFY
THAT THE DME VERSION INSTALLED ON YOUR CAR IS SUPPORTED BY CoolantSnitch™. Consult the table above for the list
of supported DMEs. In the
photograph below the DME is versioned MS45.1.
the DME back down and locate the 52 pin large connector (largest one).
The coolant temperature signal wire is part of this connector, it is a
BROWN/RED (Brown with a Red stripe) wire. See the pin assignment
table at the top for the correct DME version. After this wire is
found, locate the pin # it is attached to. To do so, remove the correct
sub-connector (26 pin) out of the 52 pin connector housing by pulling
the tab holding the sub-connector in place and pull the sub-connector
out. There could be more than one wire of the similar color, be sure to
trace the wire and find one that is attached to the pin noted in the pin
assignment table at the top of this document. In the photograph below
pin 28 is shown which is the coolant temp signal on DME versioned MS45.1
the correct wire is located, using the RED T-Tap supplied, tap into the
wire above the connector assembly. Place the tap in such a way that when
the connector is connected back to the DME, the T-Tap is pointing
sideways and not upwards.
the 9 pin connector to the DME that is housing power supply and ground
wires. It is the rightmost connector to the DME
the 2 BLUE T-Tap connectors supplied on wires in the 9 pin connector as
follows: one on the RED/WHITE/YELLOW wire and one on the BROWN Ground
wire (either ground wire can be used). Tap at an angle which will cause
the T-Taps to point sideways and not upwards when the connector is
plugged back in.
the buzzer from the main CoolantSnitch housing
if it is connected. Connect the CoolantSnitch™
RED/WHITE/YELLOW Tracer (9-pin connector)
+12V Switched Power
BROWN (9-pin connector)
BROWN/RED (52-pin connector)
Coolant Temp. Signal
DME connectors, make sure the plugs are fully seated and the arms are
snapped back into the original position
proceed with installing the buzzer. It will be located behind the
driver’s side knee bolster
the buzzer will involve removing the knee bolster. To do so, remove the
pop-out rivet on the right side of the panel where it is connected to
the center console cover.
three phillips screws on the upper end of the
the plastic screw just above the throttle assembly counter clockwise to
release and pull the panel. We cautious as there are few wiring attached
to the panel. Be sure not to put to much strain on them
the OBD plug by pushing back the Blue Ring/Clip around it. The connector
should then slip out.
the foot well light assembly by pushing the plastic clip outwards.
you may be able to work with the light and OBD plug connected, but be
careful not to damage the wiring.
task involves bringing the buzzer wiring from the CoolantSnitch (Gray wire) over into the cabin so that it can
be connected with the buzzer. The yellow plastic section depicted below
is the back side of the DME housing under the hood. You will need to use
a relatively sturdy wire and push it upwards into the opening depicted
end of the wire will appear inside the DME housing and can be used to
pull the gray wiring attached to CoolantSnitch
over into the cabin.
the end of the wire and the plug for the buzzer together and pull them
back into the cabin
the buzzer to CoolantSnitch.
the pre-attached backing tape on the buzzer and mount it on the back
side of the DME box. Apply pressure for 10 seconds for the tape to
may optionally test the device. To do so remove 2 black screws on the CoolantSnitch housing and remove the cover. The
circuitry contains a mini switch as depicted below. When placed in
“TEST” position, the device will set of the buzzer at approximately 68C
degrees. This corresponds to the temperature gauge needle reading
somewhere between the ¼ and ½ mark. Be careful
not to strip the plastic screw on the mini-switch, you should feel a
subtle notch when the switch is placed into either position, be sure it
is fully engage.
the buzzer does not get activated in the “TEST” mode by the time the
needle reaches the ½ mark, retrace your steps and make sure the device
is properly connected.
not forget to place the device back into its normal mode, reattach the
black cover and place the device somewhere inside the DME housing.
Reattach the DME cover using 4 T-25 screws.
the cabin, raise the knee bolster panel high enough to secure the foot
well light and the OBD plug back into place
the 4 phillips screws
back into place and attach the plastic rivets for the panel.
are now protected against overheating!